Formatting fixes.

1. markdown CSS class added to div.content.
2. get_summary fixed. Now it takes only first sentence from method's
docstring, same as it was for the class.
Template substitution possibility added
yaml different request and response serializers
Preserve the order of fields as declared in serializers

thanks, @jakob-o
Merge pull request #139 from ariovistus/master

yaml different request and response serializers
Merge pull request #140 from ariovistus/preserve-field-ordering

Preserve the order of fields as declared in serializers
suppress those obnoxious colons
Merge pull request #138 from dmitry-krasilnikov/master

Formatting fixes
Merge pull request #143 from ariovistus/master

suppress those obnoxious colons
some initial readthedocs docs

use selenium to get screenshots for the bling
strip markdown from operation summary
parameters' minimum and maximum are strings
Merge pull request #145 from ariovistus/master

some initial readthedocs docs
include readthedocs screenshots

for now at least
support nested serializers
Merge pull request #147 from ariovistus/master

include readthedocs screenshots
add a test and example to pull request #116
Merge pull request #148 from ariovistus/nested

add a test to #116
0.2.1 release
Merge pull request #149 from ariovistus/master

0.2.1 release
add option to select token type for Openid Connect systems and Oauth2 Systems
add doc for token_type